Anquawhite 100 Curing Agent

Transcription

1 Anquawhite 100 Curing Agent Anquawhite 100 curing agent is a novel waterborne curing agent dispersion designed for use in ambient or heat cure two part epoxy systems. Anquawhite 100 curing agent can be formulated with a variety of epoxy resins and waterborne epoxy dispersions while maintaining VOC levels < 100 g/l. It can also be formulated to high solids while maintaining low viscosity. Formulations based on Anquawhite 100 curing agent and Ancarez AR555 epoxy resin offer long pot life, fast dry, high gloss, and high water resistance at low VOC. Anquawhite 100 curing agent formulations also offer low yellowing, good acid and food stain resistance, and good water resistance. Performance Advantages Formulating latitude High solids, low viscosity Long pot life, fast dry, low VOC High gloss and stain resistance Low color and good color retention Hot tire pick up resistance Freeze thaw stable Applications Wall and floor coatings Institutional coatings Heavy duty maintenance coatings Handling Precautions Refer to the Material Safety Data Sheet for Anquawhite 100 curing agent. Typical Properties Appearance Opaque White Dispersion Color 1 (Gardner) - Viscosity 25 C (mpa.s) Amine Value 3 (mg KOH/g) 100 Specific 25 C (g/ml) 1.05 Total Solids Content, (wt %) 55 Solvent (wt %) Water 41 Propylene glycol methyl ether 4 Equivalent Wt/{H} 350 Recommended Use Level 4, (PHR) Recommended Use Level 5, (PHR) Typical Handling Properties 20 C 4, (hrs) C 5, (hrs) 4-8 LER 7 SED 8 Dry Times (hr) 6 Set to Touch 1/2 1/4 Dry to Touch 6 2 Hard Dry 12 5 Typical Performance LER 7 SED 8 Gloss (60 C) Pencil Hardness F F Impact Resistance (Direct, in lb) Impact Resistance (Reverse, in lb) 4 8 Taber Abrasion ASTM D Brookfield RVTD, Spindle 4 3 Perchloric Acid Titration 4 With Bisphenol A Diglycidyl ether (EEW=190) 5 With Ancarez AR555 Solid Epoxy Dispersion 6 ASTM D Bisphenol A Liquid Epoxy Resin (EEW 190) 8 Ancarez AR555 Solid Epoxy Dispersion 9 1,000 cycles, CS 17 Wheel, 1 Kg Weight

2 Supplementary Information Anquawhite 100 curing agent is an amine functional polymer dispersed in water and propylene glycol methyl ether. It is designed for use with either liquid epoxy resins or solid epoxy dispersions in two component water borne epoxy coatings. Key Properties: Non-volatile... 55% Water... 41% PM Solvent...4% Particle Size micron Particle Stabilization... Non-ionic Surfactant AHEW Viscosity cps Epoxy Selection and Use Levels Use Level Characteristics Bis A Liquid Epoxy phr High strength and Chemical Resistance Diluent Modified Epoxy* phr Improved Handling and Flow Acrylate Modified Epoxy** phr Faster Dry Speed, Improved Weathering Solid Epoxy Dispersion Ancarez AR phr Long Pot Life, Fast Dry, High Yellowing Resistance * Modified with 15% Epodil 748 diluent **Modified with 10% Pentaerythritol Tetraacrylate Pot-life - Liquid Epoxy Based Formulations Liquid Epoxy formulations typically have 1-3 hour pot lives characterized by steady viscosity increase throughout the pot life. End of pot life is signaled by poor flow out of the applied coating due to high viscosity. Pot life can be extended beyond 3 hours by lowering the solids content of the paint as shown in the graph below: Liquid Epoxy Formulations: Effect of Solids Content on Pot Life Air Products and Chemicals, Inc., US 2

3 Pot Life Ancarez AR555 Epoxy Resin Based Formulations Formulations based on Ancarez AR555 solid epoxy dispersion exhibit long pot lives with only moderate viscosity increase throughout pot life. End of pot life is determined by a reduction in gloss which is indicative of reduced coalescence. Pot life can be lengthened by the addition of coalescing solvents such as Propylene Glycol Phenyl Ether (PPh), Propylene Glycol Methyl Ether (PM), or Propylene Glycol n-propyl Ether (PnP). 120 Anquawhite 100 Curing Agent - Ancarez AR555 Resin Gloss & Viscosity 60 Gloss/cPs Gloss Viscosity Pot Life (hr) Yellowing Resistance Anquawhite 100 curing agent exhibits a low initial color that allows the formulation of transparent or white top coatings. It also offers better color stability than other waterborne systems or 100% solids formulations as demonstrated in the graph below. Yellowing resistance can be further improved by using excess epoxy in the formulation. Yellowing of Epoxy Clear Coats after QUVA Exposure Air Products and Chemicals, Inc., US 3

4 Chemical and Stain Resistance Anquawhite 100 curing agent has been benchmarked for chemical spot and stain resistance against established water-based epoxy technology. Good solvent resistance is observed for all water-based systems, however, Anquawhite 100 curing agent offers marked improvements in acid resistance. Anquawhite 100 curing agent based coatings remain intact upon sulfuric acid or acetic acid exposure whereas other water-based systems show severe failures. Chemical spot resistance 1h and 18h exposure Anquawhite 100 Waterborne A Waterborne B 1h 18h 1h 18h 1h 18h Toluene Ethanol Sulphuric acid (10%) H B Acetic acid (3%) + + H B H B Acetic acid (10%) H/B B B B B B + =no change; H=haze; B=blisters Food Stain Resistance 18h exposure Anquawhite 100 curing agent exhibits markedly better stain resistance against common foodstuffs. Coatings formulated with Anquawhite 100 curing agent are virtually unaffected after exposure whereas other water-based systems are significantly attacked. Anquawhite 100 Waterborne A Waterborne B Coffee no change slight stain slight stain Ketchup no change yellow stain stain/blisters Mustard no change yellow stain stain/blisters Red Wine slight stain yellow stain yellow stain Abrasion Resistance Anquawhite 100 curing agent formulated coatings exhibit abrasion resistance typical of epoxy coatings. Abrasion resistance can be optimized by adjusting epoxy-amine stoichiometry. Increasing epoxy lowers abrasion resistance while increasing Anquawhite 100 curing agent improves abrasion resistance as shown in the table below. Abrasion resistance can be further optimized by the addition of abrasion resistant pigments such as crystalline silica or aluminum oxide. Stoichiometry (Epoxy* : Amine) Taber Abrasion (mg wt loss) 0.6 : : : : Ancarez AR555 assuming EEW 1300, CS 17 wheel, 1 Kg wt, 1,000 cycles Air Products and Chemicals, Inc., US 4

5 Water Resistance Anquawhite 100 curing agent-ancarez AR555 resin clear coats, exposed to condensing humidity for 5,000 hrs, exhibited whitening but no loss of adhesion, no blistering, and only modest softening. Anquawhite 100 curing agent-ancarez AR555 resin clear coats (2 mil DFT) immersed in 1M NaCl, exhibited excellent barrier properties, maintaining high pore resistance after long term immersion as measured by EIS and shown in the Bode plot below. Storage Stability & Freeze-Thaw Stability Anquawhite 100 curing agent exhibits good storage stability for at least 12 months from date of manufacture. Storage temperature should be kept below 35 C to avoid accelerated settlement. If a soft settlement is formed it can be easily stirred up without negative impact on product and coating performance. Freeze-thaw stability has been tested in accordance with ASTM D After five cycles of freeze/thaw, particle size was unaffected and no settlement was formed. Clear coat performance as measured by surface appearance, gloss, drying speed and hardness development was unchanged. Additives Defoamers Surfynol DF-62 and DF 110D surfactants (Air Products), Foamex 840 (TEGO), and PI-4 (Dee Fo) have been identified as effective defoamers. Typical use levels are % based on total formulation weight. When using strong defoamers such as Surfynol DF 62, it is advisable to also add Surfynol 420 ( %) to counteract cratering. Wetting Agents Surfynol 420 and 440 surfactants are very effective for improving substrate wetting, crater reduction, and leveling. Typical use levels are % based on total formulation weight. Pigment wetting agents - For incorporating pigments by high speed dispersion, Surfynol 141 and Disperbyk 190 (BYK Chemie) have been found to be effective dispersing agents. Typical use levels are 1-3 % based on pigment weight. Tint Bases To minimize flooding and floating, non-ionic or universal tint bases such as Creanova M 888, M 803, COVON and Elementis WD, UL tint bases are recommended. Air Products and Chemicals, Inc., US 5

6 Rheology Modifiers Urethane associative thickeners such as Rheolate 310 and Acrysol RM 8W are recommended for reducing pigment settling and for improving sag resistance. Typical use levels are % based on total formulation weight. Addition of rheology modifiers to either Anquawhite 100 curing agent or Ancarez AR555 resin should be done slowly with good agitation to avoid destabilizing the dispersion. Processing Guidelines Additives should always be introduced to Anquawhite 100 curing agent slowly with good agitation. In some cases it is good practice to pre-dilute the additive in water to reduce any possibility of shocking the dispersion. A pigment dispersant such as Disperbyk 190 surfactant should be used when introducing pigments. Dispersing agents should be added to the formulation before pigments are introduced. In liquid epoxy based formulations, it is advisable to add a surfactant to the epoxy to ensure good emulsification even when the mixing of the A + B components of the paint is marginal. Nonyl phenol ethoxylates with ~ 40 moles of ethylene oxide and an HLB of ~ 15 work well as liquid epoxy emulsifiers. Typical use level is 4-5% based on the weight of the epoxy resin. Hot Tire Pick Up Resistance Anquawhite 100 curing agent based formulations exhibit good hot tire pick up resistance. Coatings were applied and cured 1 day at ambient temperature. A section of new tire tread was then placed on the coating and 40 psi pressure was then applied at 50 C for 2 hours. Anquawhite 100 curing agent based coatings were very comparable to the waterborne epoxy industry standard as shown below. Appearance Adhesion Damage Anquawhite 100- Ancarez AR555 Enamel Anquawhite 100 Liquid Epoxy Enamel Industry Standard Waterborne Epoxy Slight Staining No Loss of Adhesion No wrinkling, tearing, or blistering Slight Staining No Loss of Adhesion No wrinkling, tearing, or blistering Slight Staining No Loss of Adhesion No wrinkling, tearing, or blistering Air Products and Chemicals, Inc., US 6

7 Starting Point Formulations Liquid Epoxy Clear Coat A Side B Side Pounds Gallons Liquid Epoxy (EEW 190) Epodil 748 diluent Total A Side Anquawhite 100 curing agent DI H2O Surfynol DF 110D surfactant Surfynol 420 surfactant Total B Side Total A + B PVC 0 VOC (lb/gal) 0.31 Wt Solids 69% Vol Solids 67% Starting Point Formulations Solid Epoxy Dispersion based Clear Coat Pounds Gallons A Side Ancarez AR555 Resin B Side Anquawhite 100 curing agent DI H2O Defoamer Total B Totals PVC 0.0% VOC (lb/gal) 0.17 Wt Solids 66% Vol Solids 51% Air Products and Chemicals, Inc., US 7

8 Starting Point Formulations Liquid Epoxy White Gloss Enamel Pounds Gallons A Side Liquid Epoxy Resin Propylene glycol phenyl ether Total B Side Anquawhite 100 curing agent Disperbyk 190 surfactant Surfynol DF 110D surfactant Rheolate 310 thickener Water TiPure R Igepal CO 897 surfactant Surfynol 420 surfactant Total Totals Total A + B Starting Point Formulations Liquid Epoxy based White Gloss Enamel A Side B Side Pounds Gallons Ancarez 555 Resin Acrysol RM 8W thickener (25% in water) Anquawhite 100 Curative DI H2O Disperbyk 190 surfactant DF 110D R Surfynol 420 Surfactant Totals PVC 19.5% VOC (lb/gal) 0.11 Wt Solids 65% Vol Solids 47% PVC 20.8% VOC (lb/gal) 0.75 VOC (gm/l) 90 Wt Solids 79% Vol Solids 56% tell me more airproducts.com/epoxyadditives For more information, please contact us at: Air Products and Chemicals, Inc Hamilton Boulevard Allentown, PA T , F Disclaimer if Needed The information contained herein is offered without charge for use by technically qualified personnel at their discretion and risk. All statements, technical information and recommendations contained herein are based on tests and data which we believe to be reliable, but the accuracy or completeness thereof is not guaranteed and no warranty of any kind is made with respect thereto. Air Products and Chemicals, Inc., US 8